Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=28944088
&cmd=llinks): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 215
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\28944088
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Bone+Res
2017 ; 5
(ä): 17023
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Loss of the vitamin D receptor in human breast and prostate cancers strongly
induces cell apoptosis through downregulation of Wnt/?-catenin signaling
#MMPMID28944088
Zheng Y
; Trivedi T
; Lin RC
; Fong-Yee C
; Nolte R
; Manibo J
; Chen Y
; Hossain M
; Horas K
; Dunstan C
; Zhou H
; Seibel MJ
Bone Res
2017[]; 5
(ä): 17023
PMID28944088
show ga
Vitamin D co-regulates cell proliferation, differentiation and apoptosis in
numerous tissues, including cancers. The known anti-proliferative and
pro-apoptotic actions of the active metabolite of vitamin D,
1,25-dihydroxy-vitamin D [1,25(OH)(2)D] are mediated through binding to the
vitamin D receptor (VDR). Here, we report on the unexpected finding that stable
knockdown of VDR expression in the human breast and prostate cancer cell lines,
MDA-MB-231 and PC3, strongly induces cell apoptosis and inhibits cell
proliferation in vitro. Implantation of these VDR knockdown cells into the
mammary fat pad (MDA-MB-231), subcutaneously (PC3) or intra-tibially (both cell
lines) in immune-incompetent nude mice resulted in reduced tumor growth
associated with increased apoptosis and reduced cell proliferation compared with
controls. These growth-retarding effects of VDR knockdown occur in the presence
and absence of vitamin D and are independent of whether cells were grown in bone
or soft tissues. Transcriptome analysis of VDR knockdown and non-target control
cell lines demonstrated that loss of the VDR was associated with significant
attenuation in the Wnt/?-catenin signaling pathway. In particular, cytoplasmic
and nuclear ?-catenin protein levels were reduced with a corresponding
downregulation of downstream genes such as Axin2, Cyclin D1, interleukin-6
(IL-6), and IL-8. Stabilization of ?-catenin using the GSK-3? inhibitor BIO
partly reversed the growth-retarding effects of VDR knockdown. Our results
indicate that the unliganded VDR possesses hitherto unknown functions to promote
breast and prostate cancer growth, which appear to be operational not only within
but also outside the bone environment. These novel functions contrast with the
known anti-proliferative nuclear actions of the liganded VDR and may represent
targets for new diagnostic and therapeutic approaches in breast and prostate
cancer.